Why is it that we so often wake up anxious, expecting the worst things to happen?

Okay, so bad things may happen. We live in a fallen messed up world! But why wake up each day expecting them? I’m sure there are many reasons . . . one reason may be because life keeps dealing a bad hand and we end up thinking “this is how it’s always going to be.” I get that. I’ve been there. But over time I’ve learned that staying in this mindset only serves to hurt me.